Polymarket recorded $478 million in single-day notional trading volume as geopolitical tensions escalated following coordinated US and Israeli strikes on Iran.
Political markets accounted for $220 million of that activity, nearly half the total, with strike-timing contracts clearing up to $90 million, underscoring the platform’s ability to rapidly price geopolitical risk ahead of traditional financial markets.
Data aggregated by Defioasis showed the spike coincided directly with the strikes, while blockchain analytics firm Bubblemaps identified at least six addresses that reportedly generated around $1.2 million in profits from Iran-linked bets, fuelling insider trading concerns.
The surge highlighted how decentralised prediction markets are increasingly blurring the line between speculative trading and geopolitical forecasting, drawing scrutiny from regulators and lawmakers as wallets appeared to anticipate real-world outcomes with striking precision.
Meanwhile, US-regulated rival Kalshi faced backlash over its “Ali Khamenei out as Supreme Leader?” contract, which accumulated more than $50 million in total volume and roughly $20 million on the day of the strikes.
“A market on Ali Khamenei’s out as Supreme Leader was important because leadership changes in Iran have a major impact on the world order,”
Said Kalshi chief executive Tarek Mansour, adding that positions were settled at the last-traded price before the reported death and that post-death trades would be reimbursed in line with CFTC-filed contract terms.
The twin episodes underscore both the scale and speed of blockchain-based prediction markets during geopolitical shocks, while amplifying ethical and regulatory questions as crypto-native platforms increasingly shape real-time narratives around global events.